Hello, @donmoss.

Let's make sure that your QuickBooks account is set up so you'll be able to change your invoice numbers.

1. Go to the Gear Icon.
2. Choose the Sales menu.
3. Scroll down to the Sales form content section.
4. Put a checkmark on the Custom Transaction Numbers tick box.
5. Click the Save button.
6. Hit Done.

Get back to us here if you have other questions. I'm always here to help.